Oil temperature in a hydraulic hand pump

[trini]

If anyone here has experience with hydraulic hand pumps(those 10000 psi models), could you tell me how hot the oil, and by extenstion the pipes get during compression?

 

[Danger]

I'm not familiar with this particular scenario. I would surmise, though, that anything hand-operated will experience an almost unnoticeable change of temperature. My 12-tonne bottle jack doesn't even warm up. Don't take my word for it, though; there are experts in fluid dynamics who will be responding soon.

 

[FredGarvin]

The only ones I use are the very high pressure but extremely low volumetric flow. They are used to pressurize cylinders for things like stretching of shafts prior to tightening a nut. Those have no appreciable temperature increase.

 

[trini]

can they be used to sustain a 10000 psi pressure for an extended period of time? what make is it?

 

[ank_gl]

High velocities of operations are behind increased temperature, high pressure is not.

Whether something can hold 10000psi for extended periods depends on its structural design.

 

[Danger]

can they be used to sustain a 10000 psi pressure for an extended period of time? what make is it?

I would expect that, as with most hydraulic mechanisms, you can just lock out the back-flow. The pump then has nothing to do, so the duration is meaningless. Just pressurize the system and close the valve.